Hey guys this is the website i use whenever i bet on sports
http://bit.ly/1Mqq9yt, 

To make it fast, here is my Tip on how to win
i have won multiple times by using this method, but please gamble at your own risk

1st: Do a research over the two people competing (Reading articles or watching their video match)
2nd: After doing a research try to analyze what you have read or watched about them
3rd: On the betting multiplier, you can sometimes see that the lower the multiplier is, the higher their winning rate

Explanation on the 3rd guide
The sports betting company somehow know who has the higher chance of winning
that's why the lower their multiplier is, the bigger the chance of winning

for example: Mayweather's multiplier is 1.07 
             while Manny Pacquiao is 2.5


so the obvious winner will be Mayweather since he has lower multiplier
Good Luck! :D